Air-valve.



AIR VAITVE.

(Application led Mar. 15, 1900.) (No Model.)

thieme/s.

UNITED" STATES PATENT OFFICE.'

CONRADGEORGE, OF LISTOWEL, CANADA, ASSIGNOR OF'IW(I)-'`HI]V1`)SA TO JOSEIl-lUS lSNYDER MEYERSAND JOHN ARKELL, Ol, SAME PL'ACE.

AIR-vArvE.

SPECIFIGATIION form'mgpart of Letters Patent No. 664,942, datedJenuaz-y 1, 11.901.

. l, l Application led March 16, 1900. Serial No. 8,824. 'dio modali) Y T0 @u wwm/ lL/m01!! @0W/067%: E is the stem, which is providedwith disli- Be it known that I', CONRAD GEORGE, me shaped end e, whichhas fitted upon' it a comchinist, of the town of Listowel, in the county pressible rubber disk e which fits the cup b of Perth, in the Province of Ontario, Canada, loosely or with an easy fit. ItV will be noticed 55 5 have invented certain new :ind useful Imthat the base of the cup isslightly raised at provements in Air-Valves, of which the folthe center. I; lowing is zt specification. F is a, nut which is' screwed ontothe tliread- My invention relates to improvements in ed upper end of the stern E and is provided eirvalves more particularly adapted for biwith :t cross-slit in order to enable/'it to be 6o 1o cycle-tires; end the object of the invention is vscreweddown into'position. j

to devise a simple form of valve which will G is a, spiral spring extending between the always rem ein perfectly e'. -tight when closed nut F Aund the shoulder b2', encircling the oriand yet permit of the tire' being pumped with flee b3, through which the stem E extends. r facility; and it cousists,essentially, of a ces- H is e cap which'is provided with the usual 65 r 5 ing provided zit the'inner end witheJ reverseflanged and knurled `upper end. The'capH shaped cup through en orilice inthe center of is provided with a central threaded hole h, so which extends a stem which is provided nt tha-t it may be screwed down upon the stem the inner end with n rubber end disk adapted E, and thereby pull upwardly upon such stem, to fit `the cup, the outer end being thi-ended so es to force the top of the rubber disk e' 7o zo to receive the screwcep for closing the exagainstthe top of the recess or cup and also :terior of the valve, such stem being also enserve to expand the periphery of the diskI circled 'by a. spiral spring extending between against the side of the'cup, therebyforming a shoulder atthe bottom of the casing :tud a a, perfectly air-tight joint.` nut screwed onto the stem att the upperend By removing the'cap H the ordinary screw 7-5 z5 thereof, the valve being secured in position end of the tubeof the air-pump may beinen d otherwise constructed as hereinafter more serted in position. It will be noticed that the particularly explained. orifice b3 is larger lthen thestem e,so that Figure 1 is zii-sectional perspective View of when the pump 1s inserted in position the 'Y my improved form of valve. Fig. 2 is an enair will pass around the stem. 'It' willalso be 8o 3o larged detail with the valve reversed. Fig 3 noticed that the nut Fis also of less diameter is a detail of the stem and closing-disk. Fig. than the internal diameter of the casing B,

4 is a detail of the nut. so es to allow the nir to pass 'around such'nut.v

In the drawings like letters of reference in- The spring G is a. light spring and readily dicete correspondingparts in ench figure. gives to the pressure of the air. As soon as 85 A is the' envelop of n. single-tube tire. the air is forced in it forces the disk e'`fron1 B is the valve-casing, which is preferably its seat, endv es it fits looselyaround the incylindrical in form and provided with en enterior ofthe cup when the cepisremoved lnrged end B",` which has e recess or reverse it will be seen thatthe air will be forced readily cup I) formed therein. The outer edge of the through the cup around the disk iiitoI the iu- 9`o 4o enlarged head is provided with en annu-lar terior of the tire or air-chamber. Immedilip b', es shown. .D etely the pressure of the air fisv removed of C is a'. washer alsoprovided with'nn ennucourse sufehpressure will cause the disk c' to ler lip c, is shown. press upo/the upperportion of its seat-that The exterior of the casing B outside the is, the base ofthe cup-and thereby entirely 95 45 end B' is thx-ended, as indicated, and has prevent the airfrem escepiiig'eftereach presscrewed uponl it n nut D, which is screwed sure is effected. j home uponthe washer-C, and thereby causes I may statte :hexe that` the principal use of the lips b' and c of the end B' end washer C, the Spring G is to hold 4the disk .ligand prerespectively, to indent into the envelop of the ventv the .stem being last into the anterior of roo 5o tire, and thereby ineke n, perfectly sir-tight the tire should there be no pressure therein.

joint. Such a. device as I describe isextremelyv simple, and it is impossible for the air to eseafpe evendurug the process of pumping, and much more so when the cap is being` screwed home onto the upper threaded end of the valve, so as to tighten up the disk and ex [mnd it laterally into the sides of the cup, :is well as 4press up against the top thereof.

A AIthough'I describe my air-valve es particularly adapted to tires for bicycles and other wheeled vehicles, it will of course be understood that it may be with equal facility adapted for various uses in which it is desired lo eup therein and an orice leading outwardly therefrom, of the stem provided with-a diskshaped end, the rubber disk fitting.; within the recess and within which the said disk-shaped end of the stem is embedded at or near the outer or exposed end thereof whereby` the upper drawing of the stem compresses the inner side of the disk against the seaty and at the same time expands the periphery ol' the disk eireuinferentinlly against the wall of the recess :is specified.

CONRAD GEORGE.

Witnesses:

B. BOYD, H. L. 'FRIMBLI.1. v 

